/Engine/Source/Runtime/GeometryCore/Public/CompGeom/ConvexDecomposition3.h
Helper function to update all proximity data after splitting anFConvexPartapart
void UpdateProximitiesAfterSplit ( int32 SplitIdx, int32 NewIdxStart, [FPlane3d](API\Runtime\GeometryCore\FPlane3d) CutPlane, int32 SecondSideIdxStart, double OrigHullVolume )